Furnace construction



H. L. WOOD. FURNACE CONSTRUCTION.

APPLICATION men JULY 30.1w.

Patented Apr. 18, 1922.

alwumbo'z Ham) .5. 77 0M and State of Michigan,

50 heater A, such 55 tionsD and arise.

HARRY L. W001), or DOVIAGIAC, MICHIGAN, ASSIGNCB r0 PREMIER WARM AIR.-

HEATEB, COMPANY, OF DOWAGIAC,

MICHIGAN, A CORPORATION or MICHIGAN.

FURNACE CONSTRUCTION.

' Appfication filed July so,

To all whom it may concern:

Be it'known that I, HARRY L. Woon, a citizenof the United States of America, residing at Dowagia'c, in the county of Cass have invented certain new and useful Improvements in Furnace Construction, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to furnaces, and more particularly to furnaces having passages through which air flows, to be heated. The invention consists primarily in the employment of certain plates for connecting inner and outer casing members of a fur nace, which casing members form an air passage, and'in the relation of said plates to the terminal plate for the fuel feed and ash-pit projections from theheater of the furnace.

In the drawing: I

.Figur'e l is a vertical sectional view of the improved furnace, the plane of section being through the fuel feed and ash-pit projections from the heater; j

Figure 2 is ahorizontal section on line 2+2 of Figure 1; I

Figure 3 is a section on line 3-3 of Figure 2, showing a v connection between the feed mouth section ofthe furnace and an adjacent plate. 1

In these views, the reference character A designates a heater having the combustion chamber B and ash-pit C, and having projecting portions D and E, respectively having passages for fuel delivery to the combustion chamber and removal of ashes from I the ash-pit. Said heater is positioned within inner and outer-cylindrical casings F and G, formed preferably of sheet metal and havinggaps at the front of the furnace to accommodate said projecting portions of the heater. The outer casing G extends from top to bottom of the furnace, while .45 the inner casing F terminates slightly above the ash-pit level. The space between the casings F and G forms a passage for the downfiow ofair and an upflow passage is formed between the inner casing and the an arrangement being well The at the front of the outer casing is closed by a plate H having door openings I and J respectively registering with the passages in the por- E, said member II forming a known in the art.

Specification of Letters Patent. Patented Apr. 18, 1922.

1921. Serial No. 58,519.

terminal plate for said portions D and E. The lateral margins of the plate H are connected to the vertical edges of the gap in v and oppositely upon the member D, and

angular brackets M carried respectively by theplates It. being bolted to said-lugs as indicated at N. Preferably the brackets M are adapted for alimited vertical adjust. ment upon the plates K by slotting said brackets, as indicated at O, to engage the securing bolts P. By forming the lates K separately from the casings F and i and from the plate H, said plates may be rolled or cast of the necessary thickness to exerc se their spacing and partitioning function, without having either the undesirable flehglblllty or the sheet metal forming the casings, and without complicating production of the plate III. I

is a feature of the described construction that the rear edges of thetwo plates II are stressed away from each otherby the inner casing, when the latter is properly tensioned, and said plates reacting to said stress, pivot upon the bolts N and'bear firmly at their front edges against the plate H. Thus there is established a tight joint between the plates K and the front plate I-I without bolting together or otherwise positively connecting said plates. Thus as the fire-pot and combustion chamber expand and contract, there is nothing to'restrict the plates K and H from-undergoing the slight resulting relative movement, and no breakage of said parts may result from such relative movement. 7

-What I claim as my invention is:

'1'; In a furnace, a heater having projec ting portions, forming passages respectively communication with the chamber and ash-pit of the heater, inner and outer spaced casings about said heater, the outer casing having a gap therein, a terminal plate for said projecting portions havcombustion v ing door openings in registration with said passages, and closing said gap in the outer casingfand a pair of pivotally mounted plates formed separately'from said casings and terminal plate and bearing against the lateral margins of said terminal plate and the vertical edges of the gap in the outer casing and Vertical edges of the gap in the 1111161 casing.

2. In a furnace, a heater having projecting portions, forming passages respectively in communication With: the combustion chamberandash-pit of the heater, inner and outer spaced casings about said heater, having registering gaps to accommodate said projecting portions of the heater, a terminal plate forsaid projecting portions having door openings registering with said passages, said plate closing the gap in the outer casing, and a pair pivotally mounted plates, formed separately from the casings and terminal plate bearing against the lateral margins of said terminal plate and engaging the inner and outer casmgs marginal to said gaps. v

'3. In a furnace, a heater having projecing portions forming passages respectively in communication- "with the combustion chamber and ash-pit of the heater, inner and outer spaced casings about said heater, the outer casing having a gap, therein, a terminal plate" for'said projecting portions forming a closure for saidgap in'the outer casing and having door openings reg stering with said pas ages, and apair of plvotally mounted lates formed separately from said ca s'ng s and terminal plate extending be tweeiisaid inner casing and the lateral'marvgins ofthete'rminal plate and the vertical plate to thevertical edges of'the gap in the inner casings, said plates beingpivotally secured intermediate their endsfto one of a d'pr iee nep t r i In a furnace, a heater hating acornbust'ion chamber and an ash-pit, projections extending from said heater and in coinniuni cation with said combustion chamber and ash-pit, inner and outer spaced casings abou sa d hea er, the 6 see s term? natlng short of said outer casing, the outer casing having a gap therein, a terminal plate for said projecting portions having door openings in registration with Y said passages and closing said'ga'ps 1n the outer cas ng, and a pair of pivotally mounted plates formed separately from said casings and terminal plate extending from the lateral margins of said terminal plate to the inner casing, said plates terminating at their lower ends in'registration with the lower edge of said inner. casing.

6. In a furnace, a heater having a com bustion chamber and an ash-pit, projections extending from said heater in communication respectively with said combustion chamber and ash-pit, inner and outer Spaced casings surrounding said heater and having gaps to accommodate said projections, the inner casing terminating short of said outer casing and said aslrpit, a terminal plate for said projections for closing the; gap in the "outer casing, said plate having door openings respectively r-egisteringrwith said extensions, a pair of vertically. elongated plates extending from the lateral margins of said terminal plate to, said inner casing and means for plvotall connecting said plates to one of said pro ections.

7. In a furnace, a heater having. projecting portions, forming passages respectively in communication with the COIIlbHStlOIl chamber and ash-pit of the heater, inner and outer spaced casings about said heater, said casings having gaps therein to accoin modate said projecting portions and *door .openingsin registration with said passages for closing said gaps in the outer casing, and a pair'of piv'otally mounted Vertically elongated plates secured tothe'inner casing at the vertical edges of the therein, said plates being formed separately from said casings and terminal plate and bearing against the lateral margins of said terminal plate and the vertical edges of; the gap in the outer casing.

8. Ina furnace, a heater having project ing portions forming passages respectively in' communication with the combustion chamber and a sh 'pitof the heater, inner and outer spaced casings about said heater, having registering gaps to accommodate said projecting portions of the heater, a terminal plate 'for said projecting portions having door openings registering with passagessaid plate closing the 'gapfi'n the outer cas ng, and a pair of vertically ad-v justable pivotally mounted plates formed,

separately from the casing and terminal plate bearing against thelateral margins of said terminal plate and engaging the inner andouter casings marginalto saidgaps 9.111 a furnace, heater having-projecte' Po t n f sra aees espl c i ly in": communication with the combus on chamber and ash -pitof the heater, inner and outer spaced casings about said heater, the outer casing having a gap therein, a terminal plate for said projecting portions having door openings in registration with said passages and closing said gap in the outer casing, a pair of plates formed separately from said casing and terminal plate secured to said inner casing and bearing against the lateral margins of said terminal plate and the Vertical edges of thegap in 19 the outer casing, and means for pivotally' connecting said plates to one of said projections.

In testimony whereof I aifix my signature.

HARRY L. WOOD. 

